For a score I want something reminiscent of Driving with the top down
, they've never topped that one yet in any of the Marvel flicks.
For a soundtrack choice, if we're moving away from AC/DC, I would guess Led Zeppelin (Iron Maiden would be fun but they dont really "feel" Tony Stark:ish enough) will be the ones opening and closing the movie.
Although, for some reason I'm imagining that Slash & Myles Kennedy could also work. They have both this old school sound and are contemporary enough to give the movie a more modern aura: